Questions tagged [bubbles]
A coherent region of fluid embedded in a fluid with different properties (air in water) or a coherent region of fluid surrounded by a membrane embedded in a fluid which may or may not be different (such as air in a soap membrane).
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Why does light always make a rainbow on the surface of a bubble?
When light is refracted through little drops of water the rainbow is formed behind the water molecules.
When light is refracted through a glass prism the rainbow is formed inside the prism.
Then why ...
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Difference between Pressure Jump and Pressure Gradient in multiphase flow, and Relationship between them
Assuming we have a multiphase flow (maybe a bubble immersed in water) with interface separating between the two phases. The interface is defined with a certain surface tension. Due to the liquid ...
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Bubble Formation in Froth Flotation process
I've recently attended a lecture on the metallurgical process of froth flotation. To make us understand froth, my teacher gave us the example of soap bubbles. But in actual practice, the flotation ...
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Why does air bubbles form when it is poured on another liquid surface [duplicate]
Reason behind the formation of air bubbles .
Force dynamics bw water and air
And how long does it take the air bubbles to pop and what factor the popping depends.
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How do bubbles on water surface merge?
When we open a tap over a water surface, we get to see a lot of bubbles ("half merged in the water") coming out on the surface.
Now what I saw was that two such nearby half bubbles merge to ...
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Formation of bubbles on the water surface
So I noticed it a few days back that when a streamlined flow of water from a tap falls on a water surface you don't get any bubble at the point of contact but the moment I place the water surface ...
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Why does air get trapped below water pouring into a glass?
The drinking-water-tap at my workplace has a low pressure continuous stream of water. When I pour water into a glass which has at least about (depth) 5cm of water in it, surprisingly large air bubbles ...
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Could sonoluminescence be the result of the Casimir Effect?
My question concerns Sonoluminescence. I was amazed to learn that collapsing cavitations in liquids generate temperatures greater than 20,000 Kelvin. Is it possible that the vast amount of energy ...
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Pressure inside a bubble/drop of water due to surface tension
I was studying problems in capillary action in fluid mechanics and I have a fundamental doubt. Is the excess pressure inside a bubble/spherical fluid body caused by surface tension, the same all ...
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How to calculate pressure necessary to push air bubble out of capillary [closed]
An air bubble is kept by surface tension at the bottom of a capillary. The capillary is sealed at the bottom, where the air bubble sits.
How to calculate the pressure necessary to push the air bubble ...
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What would happen to a soap bubble if there were no surface tension?
Suppose you have a soap bubble. Now, suppose that the surface tension in the liquid film that surrounds the bubble disappears instantly. What would happen to the bubble? Also, is it possible to form a ...
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Why does a bubble created in the body of a liquid pop when it rises to the surface?
Suppose you have a glass of water and you blow bubbles in the water using a straw. The bubbles pop when they rise to the surface of water. Why does this happen? Does the surface tension of water play ...
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What caused the air bubbles on the bottle wall to move downwards?
Recently, I found an interesting phenomenon. I observe that there are some air bubbles formed on my bottle wall, as shown in the image.
Then, I tilt the water bottle gently such that the water level ...
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Why does the gas cloud of an underwater gunshot pulse?
I have been watching some slow motion video and I was intrigued by the slow motion underwater gunshot. The first moments of the video go as expected. The gun fires and a cloud forms in front of the ...
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Why are water bubbles created at the top of the bottle if the water level is higher?
Water bubbles created at the top of the bottle if the water level is higher:
but water bubbles is not created at the top of the bottle if the water level is lower:
This question is very different ...
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How does a bubble pop?
I was looking at some old slow motion videos showing a phenomenon where a bubble is popped by firing a sphere (or pea) through it.
One obvious thing that happens is that the pea does not pop the ...
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Why does bubble formation only happens at the point when vapor pressure becomes equal to atmospheric pressure during boiling?
I am a high school student and I am very confused about what's actually happening at the microscopic scale in an ideal solution when it's boiling?
Boiling as I understand at microscopic level is- ...
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Inverting a bubble interface to recover the level set function
I have access to some high quality CFD data that includes 2D and 3D level set functions for simulations of bubbles. Masking the level set function using a heaviside is easy and it is a fast way to get ...
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How are curved soap films stable?
How do curved soap films remain in equilibrium, if surface tension tries to pull them taut?
What I understand:
Surface tension acts tangentially on a surface.
The potential is energy is proportional ...
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Surviving under water in air bubble
An incredible news story today is about a man who survived for two days at the bottom of the sea (~30 m deep) in a capsized boat, in an air bubble that formed in a corner of the boat. He was ...
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Time taken by an air bubble on the sea depth to reach sea level
There is an air bubble at a depth of s meters above sea level.
Suppose the air is an ideal gas and Temperature is constant.
I would like to calculate the time it takes for it to reach sea level.
The ...
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Why is it hard to push the empty upside down mug inside the water?
It is hard to push the empty upside down mug inside the water as it has air present inside its cavity which prevents the water from entering inside the mug. But when we tilt that mug which is still ...
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What are Bubbling Geometries?
I know that Wilson loops in certain higher rank representations are dual to Bubbling Geometries. Also, certain local operators are dual to this kind of solutions. But (independently from holography), ...
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Can a soap bubble bounce off a laser?
Clip; I presume some momentum transfer's at play, but can't put a full picture together. What's going on - why does the laser 'repel' the bubble? ... or is it fake?
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Potential energy of a gas lighter than air
Here is the situation. Let's say I have have a mass of a given liquid and I heat it to create a gas. The gas has a lower density than air, so it will move higher and higer in the atmosphere. Then, I ...
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How are bubbles formed when a raindrop hits a flat pool of water?
I have noticed that raindrop impact can create a bubble on the surface of the water in a hot tub (104°F) up to several centimeters in diameter that is stable for several seconds before bursting.
The ...
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Optics of thick soap bubbles
There was some discussion in a previous thread ( Why are thin soap bubbles colorless? ) that talked about thin soap bubbles. My question is, what if we go the opposite way? Why are thick bubbles ...
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Electron as a wave function, is it a wave bubble? [closed]
Something I have been pondering.
We tend to think of a physical particle as a grain of sand or at atomic levels maybe an electron(lepton).
If I now choose to consider an electron as a wave, typically ...
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In beer, why do bubbles travel faster upwards in the center?
This is a very odd question, but I just so happened to be observing a pint of beer and realized that the bubbles floating up seemed to travel faster towards the center of the glass than towards the ...
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Can real particles be created from a false vacuum spontaneously through decay?
Consider false vacuum decay.
Given the energy difference between the false to true,
Can this process lead to the creation of real particles as well as the vacuum bubbles?
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Bubble phenomenon
A few days ago I encountered a problem that caught my attention:
The surface of an air bubble oscillates at a frequency of $20$ kHZ. We
observe that this oscillation causes another air bubble nearby ...
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Bubbles formed in standing water in glass
I kept a cold standing water in a glass for a while to warm it up. After a while I returned to see that small minute bubbles have formed in the glass. On closer inspection, the bubbles seem to not ...
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Why is this the "no bubbles" condition?
I'm reading through the "Waves" textbook from the Berkley series. In section 7.3, water waves are described. First, the condition that water is incompressible is derived as follows (assuming ...
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What is the explanation for the structure of foam?
When you look at any gas in liquid foam, you'll see a particular structure.
You'll find that the structure consists of some bigger bubbles along with some smaller and smaller ones.
I would like to ...
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Calculating the pressure inside catenoid formed using soap film?
Soap film will not readily form a cylinder, instead, it will form a catenoid if it's circular faces are flat. I know that this happens to minimise surface area.
But how to prove that this provides the ...
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Necking stage in bubble detachment
The first image is the bubble dynamics in nucleate boiling, in a) you can see that the bubble is detaching by minimizing contact line with surface until zero, while in b) the bubble is enlongate and ...
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Surface tension in a bubble
In a bubble or liquid droplet how is tangential surface tension force assumed to be balanced by perpendicular pressure force?
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Why do soap bubbles seem to resist merging?
When playing with soap bubbles in a bathtub, it seems impossible to bring two bubbles together to form a single larger bubble. When two floating bubbles meet, a wall is formed between them. Even when ...
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If vacuum decay was somehow triggered inside a black hole, would the rest of the universe notice?
If vacuum decay is triggered, it will spread (at maximum) at the speed of light. But the spacetime inside a black hole is causally disconnected from the space outside. Nothing that happens inside the ...
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What would happen if a true vacuum expanded within the event horizon of a black hole? [duplicate]
If a bubble of a false vacuum decaying to a true vacuum state (in one of the fields described by the Standard Model) somehow expanded starting from a point within the event horizon of a black hole, ...
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Is it possible for bubbles to exist in vacuum?
In the case of a bubble, the outside pressure is less then the inside pressure.
If that is the case can bubbles exist in vacuum? I am not sure but this should be true if vacuum has zero pressure
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Why doesn't a frothing drink overflow the glass?
When you pour an aerated (fizzy) drink such as lemonade or beer into a glass, the froth rises above the liquid level, but usually stops rising when it reaches the rim of the glass, even though you ...
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Why does the force on bubble on a flow differ from that of a sphere in a flow?
Background:
A tiny sphere of radius $a$ in a slow moving laminar fluid flow with viscosity $\mu$ is acted on by a force given by the well known Stokes equation:
$$F_s = 6 \pi \mu a U,$$
where $U$ is ...
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Which forces keep two soap bubbles together?
I am trying to calculate how many soap bubbles can hang together against the force of gravity, but I am not sure what forces hold them together. My guess is the surface tension, so an equation like $F=...
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Hydrogen in soap bubble
I read somewhere that if hydrogen gas is passed through soap solution bubbles containing hydrogen are formed. My question is how these bubbles are stable! Hydrogen has much less density and mass than ...
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How do you mathematically describe the quantum bubble?
The vacuum is filled with quantum bubbles. In a Feynman diagram this would correspond to a closed one particle propagator line, a circle, or a bubble. I'm curious how this is described mathematically. ...
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Why bubbles are not moving up in a kettle full of water?
When I boil water in the kettle, many tiny bobbles appear after a short time, long before boiling (See video here). They don't seem to come from the bottom of the kettle, like in boiling, but from ...
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Does bubble in the buble chamber represented the actural measurement of the particle or the trajectory of the potential?
The bauble chamber was used as a measurement in the particle physics. Traditionally, the thoughts were that when the particle made an excitation in the chamber, as to physically measured, a bubble was ...
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Dimensional analysis of soap bubble formation
I was wondering how the radius of a soap bubble depends on the way it is formed and tried to come up with a simple argument using dimensional analysis. I am not sure if that argument if correct, or ...
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What causes loud sound when popping a balloon/bubble?
As I chew my gum, I wonder: when I blow and pop bubbles, what creates the snapping sound?
Or similarly, what causes the loud POP when one pops a balloon? Is it the rush of air from inside the pocket ...
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